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Is there a technical reason why phone numbers would be easier to spoof in North America than other places?

Anecdotally I’ve not heard as much about it being a problem in other places such as the UK.

It is possible to "spoof" numbers in the UK. I've seen it. Calls from outside the UK masquerading as UK numbers. They tend to use London numbers which is the main giveaway.

I'd say the deregulation of the telephone industry in America, breaking up the baby Bells, etc would have probably been the biggest hand.

We broke everything up and let any old player enter the telco world over here which broke the entire sanctity of the security of the telephone network.

I'm not sure if that's the whole story, because I speak from a Canadian perspective where telecom ownership is quite protectionist. And these spoofed numbers are almost always local. I guess bad-faith US telcos could allow spoofing Canadian NANP numbers...

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